Jaw crusher



E. B. sYMoNs 1,874,830l

Aug. 30, 1932.

JAW CRUSHER Filed Jly 24, 1930 4 Sheets-Sheet l l ILIII .NWN

E. B. SYMONS v JAw cRsHER Aug. 30, 1932.

Filed July 24. 1930 4 Sheets-Sheet 2 E. B. sYMoNs JAW CRUSHER Aug. 3o, 1932.

Filed July 24. 1930 Sheets-Sheet 3 Aug. 3o, 41932.

E. B. sYMoNs 1,874,830

JAW CRUSHER Filed July 24, 1930 4 Sheets-Sheet 4 [2? Vez? for Patented g. 30, 1932 UNITED STATES PATENT ori-ICE EDGAR B. SYMONS, OF HOLLYWOOD, CALIFORNIA, .ASSIGNOR TO NORDBERG- MANU- FACTURING COMPANY, 0F MILWAUKEE, WISCONSIN, A CORPORATION OF WIS- CONSIN .uw clws'nnn Application led J'uly 24,

My invention relates to an improvement in Crushers, and particularly to an improvement in jaw Crushers. A particular embodiment of my invention is a jaw crusher having one normally fixed jaw, and a normally moving jaw together with means for moving the moving jaw toward and away from the normally fixed jaw. One object of my invention herein described, is to provide improved lubricating means for a crusher of the type described. Another object is the provision of improved driving means or actuating means for the moving jaw of a jaw Crusher. Another object is Ythe provision of improved means for protecting the bearings of the jaw crusher and for preventing the access of dirt and grit thereto. Other objects will appear from time to time in the course of the specification and claims.

I illustrate my invention more or lessv diagrammatically in the accompanying drawings, wherein Figure-1 is an end elevation;

Figure 2 'is a section on the line 2-2 o Figure 1; l Figure 3::is...a side elevation;

Figure 4'is a section on the line 4.-4 of Figure 2; and

Figure 5 is a section on the line 5-5 of Figure 2. l.

Like parts are indicated by like symbols throughout thespgcication and drawings.

Referring to the drawings A generally indicates any suitable base or foundation or surface upon which the crushing machine may be mounted. The crushing machine frame generally indicated as'A1 includes any suitable bottom plate or flange portions A2 which lmay be bolted, as by the bolts A1, to'the foundations A. Preferably formed integrally with the plates or anges A2 are the upwardly extending frame members A* between which is formed the tank portion havingA the bottom wall A5. the side walls A A7, the top wall A8 and the transverse baille or partition A, depending from the top A8.

In the upper portion of each of the members'A* is a bearing or shaft engaging portion B to which may@ be locked the opposed shaft engaging portion B1 as by the bolts 1930. serial No. 470,277. B2 and nuts B1. The shaft B1 is thereby mounted on and locked in relation to the erably the bushing B5 is keyed to rotate with' t-he hub C. about thel outer surface of the shaft B1. As strengthening and reinforcement for the plate C1 are provided a plurality of ribs 'C2 which extend, as shown in Figures 1 and 2` from the hub C downwardly along and beneath the plate C1, the rib C2 having in it an enlargement in the form of a perforated boss C5. The ribs C2 terminate at their lower or outer ends in a transverse rib C". A corresponding rib C7 extends across the bottom of the plate C1, the ribs C6 and C" being connected by longitudinal ribs C8. to form in effect a box structure, the purpose of which will later appear. C1 are a plurality of lugs projecting from the bottom of the plate C1 which are provided with apertures C".

In order to actuate the jaw a driven shaft .D is/provided with an eccentric portion D1. The shaft may be actuated as by the pulley or pulleys D2, but it will be understood that any suitable drive may be employed. The shaft D may rotate for example in bearings D3 D3v formed in or associated with the opposite frame member A4. D* indicates any suitable bearing bushings. Surrounding the eccentric portion D1 of the shaft is a split sleeve formed with the boss D5 and Dc'which may be locked together as by the bolts D1 and nuts D8. Within the sleeve so formed, and surrounding the eccentric portion D1 is any suitable bearing bushing or bushings D9, indicated in Fig-ure 2 as split. Upwardly projecting from the member D is an arm D1o having inset in its outer surface a bearin block D11. A corresponding bearing `bloc D12 is inset in the bottom of the jaw plate C1, and a roller rod or bearing-rod D1 is interposed between them, the blocks y being channeled to receive it and conform to its cylindrical exterior. It will be understood that as the shaft D rotates the eccentric portion D1 will impart to the arm D1o and thus to the jaw plate C1 an oscillating or reciprocating movement. In order t maintain constant contact with the roller D13 with the opposed blocks D11fD12, thus maintaining a rm and constant driving connection/'I provide the following.

Extending through the apertures C of the lugs C is a tube E the ends of which pass through eye-bolts E1. The eye E2 of ,each such bolt is held upon the end of the tube E, as by a washer I3 which may be fashioned in any suitable manner upon the tube E. I may for example employ a cotter pin I1. It will be understood that the ends o f the tube E pass outwardly through the casting and that the eye-bolts E1 are exterior to the members A? of the casting. This aperture is indicated for example at Ils in Figure 3, the aperture being of suliicient size to permit a substantial movement of the tube E in relation to the frame. The aperture also permits inspection of interior parts. Each eye-bolt E1 vpasses through a lug I6 formed on the exterior of the frame member A1 and aperturedv as at I7 to permit the bolt to pass therethrough. An abutment I8, below said lug, is mounted upon each eye-bolt E1, in the form of a stout washer which may be positioned as by the nuts I9 upon the screwthreaded end portion I1 of the eye-bolt. Compressed between the abutment or washer I8 and the lug I6 is indicated a spring I11. It will be understood that the spring tends to draw the plate C1 downwardly toward the shaft D, and

thereby maintains a constant working andbearing connection between the roller D18 and the opposed blocks D11 and D12.

Asa bearing or wear taking member to effect the actual crushingI may employ for example the face or crushing plate G. Its opposed edges and bevelled'as at G1 G2. The lower bevelled edge G1 is gripped by the overhangilg portion G11 of the lower edge of the plate 1. The up er edge is clamped, as by the wedge block 1. vAs shown in Fi ure 2 the plate C1 is provided with a beve outwardly inclined surface G5 and, as will be seen from Figure 2, the wedge block G1 performs the double function of drawing down the vupper edge of the plate G, and of thrust'- ing the'plate G longitudinally against the overhang G3 at the bottom of the plate C1. The wedge blocks G1 may be drawn down as by the bolts G2, with their nuts G", the bolts passing through the bosses C5. GB indicates a wear ,taking plate adapted to protect the hub C from battering. It is. removably mounted, as by the bolts G1 with the nuts G10. G11 is a batter pla secured as at G12 to the lower edge of the plate C1 below the lower edge of the'wear plate G.

The jaw plate C1 is also provided with side flanges G18, upwardly projecting, and genper jawwhich is normally fixed. I provide means, however, for permitting movement of the upper jaw in case uncrushable material, such as tramp iron, passes through the crushing cav'ity. Referring for example to Figure 3it will be seen that the side frame members A1 are provided at their upper edges with laterally expanded portions K in the form of ianges laterally outwardly extending4 from the/main web or plate Aj. These iianges are provided with an outer downwardly turned portion K1.' The ends are supported for example by the inclined edged webs K2, formed preferably integrally with the plate A1. An

intermediate web or support K15 may also be employed. At two points, preferably ad# jacent the opposite edges of the portion K, it is recessed as at K3 to receive cylindrical projections K1 from the jaw plate supporting elements generally indicated as L. The members K1are normally held seated in the position in which they are shown by the securing or abutment plates K8 which overlie them and which are apertured. or formed as at K111 to conform to them. These members K8 are' downwardly thrust against the members K1 and the abutment websor flanges K for example by the emplbyment of a plurality ofl bolts K1. These bolts extend through the members K8 and the flange K, out of line with i the members K4. Abutments members K1 are provided and betweenvthe members K10 and the lower surface of the flange K are compressed a plurality ofsprings K11. K12

indicates lock nuts for the tops of the bolts K11 and K13 indicates nuts,or washers for the bottoms. It willthus be seen that the springs K11 normally draw vthe membersK1 downwardly toward the flanges K, whereby the l jaw structure below described is normally yheld fixed in relationto the frame members A1. Secured to the jaw plate supporting elements L as by the bolts L1 is a carrier M for the lower fixed jaw plate M1 which may be secured to the carrier M by any suitable means.

In order tomaintain proper lubrication of the moving parts and to prevent the yaccess of dust to moving parts I provide the following system. Projecting upwardly about the connection D10 between the eccentric D1 and the lower jaw structure C1 I provide a surrounding housing structure generally indihousing awa from Figure 5.

cated as O. This housing- O is bolted as at O1 tothe oil container which includes the walls A, A", A7, As and projects upwardly about the member D10. It terminates in two con'- centric and somewhat arcuate walls O2 Oa opposed to washers or wiping members O4L O5 on the flanges C6 and CT respectively ofthe plate support or aw C1. It will be understood that the form of the opposed parts is such that as the jaw oscillates about its center of rotation the wiping members contact the exterior of the walls or members O2 O3, preventing any access of dust to the closed housing thus formed. O8 indicates a bailie adapted further to direct what slight dust does penetrate the` from the bearing roller D11. It will be understood that the packing or wiping means O4 O5 are continued as at O7 along the flanges or walls C8 which contact the iianges C6 C1. This structure will beV clear I may provide any suitable oil circulating meansfor delivering oil from the` oil housing to the bearings. I indicate for example a gear P upon the shaft D which gear meshes with and drives a pinion P1. The shaft P2,

. associated with the pinion, may drive any suitable pump mounted for example in the pump housing P3 andvnot herein shown in detail. P4 indicates an oil deliverypipe extending from the pump housing, along which the pump is adapted to direct a flow of oil.

P5 indicates an oil pipe extending from the oil reservoir to the-pump, through which oil'` is drawn for delivery along the pipe P". P*

communicates with an oil duct P" which exi/y tends to the packing gland P" and communicates with an axial passage Ps in the shaft D. Outlets P9 for the said duct Paare adapted to deliver oil to .the bearing surface of the eccentric D1. The oil may escape along the bushing D and may drip back into the oil reservoir. The bearings D1 which'journal the shaft D are lubricated by the same oil stream or oil delivery through the outlets P20 communicatin with the oil duct P8. P10 indicates an 011 delivery-pipe extending to the axial o'r longitudinal passage P12 in the shaft B4, asillustrated in Figures 3 and 4. P1s indicates oil outlet ducts through the bearing surface of said shaft. They extend for example to themilled-out portion 11l in the shaft B4. The oil may escape along the bushing Bs into the chambers or pockets P21 which may be closed as\by the packinfg'members P2. Communicating with the chambers P21 are the drain ductsP22 through which the oil may flowinto the ,passage`P 2?. P2* indicates a return oil duct whereby the oil from the passage P23 is delivered into a chamber P2i having an outlet P26 at a point adjacent the roller D13 which is thereby lubricated.` The Y oil drips back into the reservoir. The baiile 0 serves to prevent the dripor delivery of oil to the wiping member O". P16 indicates oil bearings D*l is returned to the oil reservoir.

P19 indicates an oil inlet pipe, having the cap P1", whereby any desired quantity ofoil may be delivered to the oil reservoir. Referring to Figure 3, P7 indicates any suitable relief valve whereb 'excess pressure 73 in the oil ducts P, P and 1 ma be eliminated, the expelledoil is returned into the oil chamber through the duct P28. P30 indicates a sight feed oil gauge.

It will be observed that the oscillation or '-30' movement of the lower'jaw structures pro- ,gressively increases anddimim'shes the volume of a1r within the oil reservoir, owing to the fact that the cavity of theV oil Areservoir opens to the lower face 'of the plate C1. As 85 the jaw rises there is a tendency to suck air into the oil housing and as the jaw falls there is a tendency to expel air. In order to prevent admission of dust by-such air ilow I provide an air inlet shown for` example in 9 Figure 2 as follows. Q indicates the main air inlet passage closed by a perforated late Q1. The perforations Q2 are masked y la flexible diaphragm Q3., which permits movement of air downwardly through the apertures, but resists movement of air upwardly through the aperture'sbeing flattened against the plate "Q1 by any upwardly exerted air pressure. Q1 indicates a-passage in communi` however, may be removed, as by loosening 1 of the wing nuts Q9 mountedon the pivoted eye-bolts Q1". The result v is the admission of dust-free air into the oil housing, through, the apertui'e Q, associated with means for pre- 'venting retrograde movement of air upwardly through the aperture Q. It will be understood `from this' structure that as the j aw. plate C1 rises, air is drawn through the aperture Q. As the jaw falls air is forced downwardly around ythe packings O* O5 O1, blowing away the dust, or preventing the inward movement of dust or dust filled air into the oil housing. 'v

It will be realized that although I have described and shown a practical ,and operative device, nevertheless many changes may be broad sense illustrative andxdiagrammatimrather than as limiting mejjtomy specic showing. In particular it wil-1 "be understood that I do not wish to be limited, except so cation with the top of the plate Q1. 'It is 10.

far as I limit myself in mv claims, to any action of the Crusher.

particular shapeor profile or angle of crushing jaw or plate, as I may vary them considerably without destroying the characteristic The use and operation of as follows: l

I employ a jaw crusher having preferably an inclined, lower jaw, and an upper jaw overhangingor overlying a substantial pro-k portion of the area of the lower jaw. In the particular form of my device herein shown the lower' jaw C1 is pivoted adjacent or above the upper edge of its effective crushingarea, and is oscillated or rotated, through a rather substantial arc, about its pivot, in `such fashmy invention are ion that the travel or throw of the crushing plate G increases progressively from top to bottom. The driving connection is made from the lower portion of the crushing jaw, whereby the eccentric D1 by its rotation oscillates or pivots the jaw C1, giving the plate (Jr itsJ characteristic crushing movement. TheA upper or overhanging jaw M, with the crushing plate M1 is normally ixed upon the frame of the Crusher. However, I provide a yielding connection between the upperjaw structure and the frame, whereby it may give in response to the passage of uncrushable material through the crushing machine.

I claim 1. In a jaw Crusher, a normally fixed jaw and a moving jaw opposed thereto, and actuating means for said moving jaw and a housing to the rear of said moving jaw, adapted to surround said actuating means, a portion of the moving jaw forming a closure for said housing, a lubricant within said housing and means for directing said lubricant to said actuatlng means.

2. In a jaw crusher, a normally fixed jaw and a -moving jaw opposed thereto, a hous- V ing to the rear of said moving j aw, eccentric actuating means for said jaw, positioned .within said housing, a bodyl of-lubricant within said housing, a pivotal mounting 4 adj acent the upper portion of said jaw, means for delivering lubricant from said housing to said pivotal mounting, and for returning said lubricant thence to the housing.

3. In a jaw Crusher, a normally fixed jaw and a moving jaw opposed thereto, and actuating means for said moving jaw including an eccentric member and means for rotating it, a housing positioned to the rear of'said moving jaw and surrounding said eccentric, said jaw being adapted to form a closure for said housing, a lubricant within said housing,

pumping means associated with said eccen' tric, a bearing upon which said moving jaw is rotatably mounted, and means for conducting oil from said pump to said bearing.

4. In fa jaw crusher, a normally fixed jaw and a, moving-j aw opposed thereto, and actu-l ;ating'means for said moving jaw including an eccentric member and means for rotating it, a

uly 1930.

- EDGAR B. srMoNs.v 

